From my experience every dev has a slightly different way of learning - I learn the best by watching videos (and experimenting/teaching afterwards), some prefer going through tutorials, reading articles and of course - reading books.

Personally I tend to read non-technical non-fiction books, growing as a person helps me grow as an engineer as well. Some of my favorites I've read in the last year or two:

"Sapiens"

"Extreme Ownership"

"How to Win Friends and Influence People" - this is a terrible title but I cannot recommend this book enough

"Radical Candor"

"Incognito: The Secret Lives of the Brain"

When it comes to JavaScript recommendations, I've reached out to folks on Twitter and they responded with some excellent books: